Wind turbine blade mold structure

ABSTRACT

A wind turbine blade mold structure includes reinforcing structures separately mounted on outer surfaces of a lower mold and an upper mold, and conformal support structures or support structures, each with one end fixed on the ground and the other end resisting the reinforcing structures; the conformal support structures or the support structures are adjustable in horizontal heights; the structure improves the flexural rigidity, thus greatly improving the anti-deformation capacity of a shell to simplify the support structures, accelerating the manufacturing and mounting process, reducing the dimensions of the structure, reducing the overall weight of a mechanism, facilitating the transportation, and reducing the energy consumption and pollution.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is the Continuation Application of InternationalApplication No. PCT/CN2022/114164 filed on 23 Aug. 2022 which designatedthe U.S. and claims priority to Chinese Application Nos.CN202210830996.3 and CN202221821127.6 filed on 15 Jul. 2022, the entirecontents of each of which are hereby incorporated by reference.

TECHNICAL FIELD

The present invention relates to the field of wind turbine blade molds,and specifically to a novel wind turbine blade mold structure.

BACKGROUND

Wind is a natural phenomenon on the earth, which is caused by solarradiant heat. The sunlight irradiates the earth surface, and differentparts on the earth surface are heated differently to generate atemperature difference, thus causing atmospheric convection to formwind. Wind energy is kinetic energy of air. The magnitude of the windenergy is determined by wind speed and density of the air. The globalwind energy is about 2.74×10⁹ MW, including available wind energy of2×10⁷ MW, which is 10 times the total volume of available hydroenergy onthe earth. The kinetic energy of air flow is wind energy. Wind energy isa form converted from solar energy. The radiation of the sun causesnon-uniform heating of the earth surface, which causes non-uniformpressure distribution in the atmosphere, and thus air motion along ahorizontal direction to form wind.

Wind energy is a kind of available energy provided to human beings byair flow doing work, and is a renewable energy. The kinetic energy ofthe air flow is wind energy. A higher air flow rate indicates higherkinetic energy. The kinetic energy of wind can be converted into arotary motion using a windmill to drive a power generator to generateelectricity through transmitting the rotating power of a rotor to thepower generator via a transmission shaft.

The cost of using wind to generate electricity has decreasedconsiderably. Even without additional external costs, the cost of usingwind power generation in many suitable locations has been less than thatof diesel generators. With the development of carbon neutrality and peakcarbon dioxide emission in the world, clean energy becomes a unifieddirection of global vigorous development, such that the wind power, asone of the clean energies, also rises and develops rapidly throughoutthe world.

Wind turbines are used for continuously converting wind energy intostandard municipal electricity for houses, which obviously savesresources. A street lamp using free energy all the year round can bemade by virtue of the wind turbine in a mountainous area. A night roadsign lamp can be made from the wind turbine on an expressway. Childrenin mountain areas can study at night under fluorescent lamps. The windturbine can also be used on the roof of small and high-rise buildings inthe urban regions, which not only saves energy, but is also a real greenpower supply. A household wind turbine not only prevents power failure,but also increases life interest. In tourist attractions, borderdefenses, schools, troops and even backward mountainous areas, windturbines is becoming a hot spot for people to purchase. Radioaficionados can use their own skills to serve people living inmountainous areas in the aspect of wind power generation, so that peopleliving in mountainous areas can watch televisions and use electricityfor lighting just like people living in cities. The radio aficionadoscan live a good life by such techniques. Therefore, the wind powermarket is prosperous, and wind turbine blade manufacturers alsomanufacture blades overtime to meet the requirements of the largemarket. In order to fast and efficiently manufacture wind turbine bladeswith high quality, various new techniques and fixtures also emerge formeeting the requirements of the wind turbine blade manufactures.

In the prior art, a typical wind turbine blade mold is composed of acomposite material mold shell (101), support structures (201, 202) ofthe shell, an action mechanism 401 and other accessory structures, asshown in FIG. 1 . Glass fiber reinforced plastic shells of the moldmainly provides an overall dimension for blade manufacturing and otherprocess conditions such as vacuum, temperature and the like. The glassfiber reinforced plastic shell usually has a thickness of 10 mm to 60mm. The glass fiber reinforced plastic shell is provided with a bottomframework support which is usually of a spatial structure formed bywelding structural steel. The bottom framework support is integratedwith the mold shell to maintain the accuracy of the geometric dimensionsof the mold shell in the blade manufacturing process. Common actionmechanisms include traveling cranes or turnover arms which are arrangedat a certain interval along the length direction of the mold. They areused for driving the upper mold (302) to turn over in processes ofclosing and opening the two molds (301, 302). A typical blade mold isshown in FIG. 1 . For a mold using turnover arms, the upper mold steelframe supports (202) are on the turnover arms, and the turnover arms aremounted on the ground. Thus, the turnover arms also serve as pivots tosupport the upper mold when the upper mold is in an opening state. Atypical mold turnover action is shown in FIG. 2 .

Since the blades have different lengths and shapes, steel frames of amold manufactured for a wind turbine blade is designated for thedimensions of the wind turbine blade in view of that a ground projectionarea of the steel frame structure is basically equal to that of theblade. A typical steel frame support structure is shown in FIG. 3 . Theglass fiber reinforced plastic shell of the wind turbine blade mold isrelatively low in rigidity. In order to maintain the profile accuracy ofthe shell, dense support structures are needed, resulting in complicatedstructures and difficulties in design and manufacturing. Moreover, thecorresponding mold will be abandoned if this kind of blades are nolonger produced, and the steel frames cannot be used on other molds andcan only be disposed as waste steel. The production cycle of each kindof blades is about 2 years at present, and about tens of tons of steelwill be used for each set of mold, leading to a considerable waste.

SUMMARY

Objective: The present utility model is intended to solve theshortcomings in the prior art by providing a wind turbine blade moldstructure which improves the flexural rigidity, thus greatly improvingthe anti-deformation capacity of a shell to simplify the supportstructures, accelerating the manufacturing and mounting, reducing thedimensions of the structure, reducing the overall weight of a mechanism,facilitating the transportation, reducing the energy consumption andpollution, improving the mounting efficiency and saving the cost.

Technical scheme: In order to achieve the above objective, a windturbine blade mold structure is provided, comprising a lower mold; anupper mold; a lower mold shell support structure and an upper mold shellsupport structure located on inner surfaces of the lower mold and theupper mold, respectively; a turnover mechanism configured for drivingthe upper mold shell support structure to turn over above the lower moldshell support structure; reinforcing structures separately mounted onouter surfaces of the lower mold and the upper mold; and conformalsupport structures or support structures, each with one end fixed on theground and the other end resisting the reinforcing structures, whereinthe conformal support structures or the support structures areadjustable in horizontal heights; the conformal support structures orthe support structures can be combined arbitrarily according to shapesof the reinforcing structures, featuring high flexibility. Adaptation todifferent kinds of blades only requires a replacement of the shellstructure and adjustment of the horizontal heights of the conformalsupport structures or support structures to adapt to molds of differentblades, thus achieving reuse, improving the mounting efficiency andsaving the cost.

Each of the reinforcing structures is a reinforcing rib structure, a boxstructure, a sandwich structure made of a low-density material, a framestructure, or a combined structure of two or more of the abovestructures. The reinforcing rib structure, the box structure and theframe structure of the reinforcing structures are made of a metalmaterial or a composite material or a combination of the metal materialand the composite material. Thus, the flexural rigidity of the enhancedglass fiber reinforced plastic mold shell structure is greater than thatof a common mold shell by several orders of magnitude, so that theanti-deformation capacity of the shell is greatly improved, providingnecessary conditions for fewer and simpler support structures.

In a further preferred embodiment of the present utility model, wheneach of the reinforcing structures has a curved surface, the reinforcingstructure is resisted by the conformal support structure; when the windturbine blade mold needs to be opened to a certain angle, the upper moldor the lower mold is supported by the conformal support structures,which ensure an environment for manufacturing a boundary dimension ofthe blade and other process conditions.

In a further preferred embodiment of the present utility model, wheneach of the reinforcing structures has a planar surface, the reinforcingstructure is resisted by the conformal support structure or the supportstructure.

The conformal support structures or the support structures are combinedarbitrarily according to shapes of the reinforcing structures. There arevarious implementations for the support structures. Any implementationcan be combined with the conformal support structures.

When the reinforcing structure on the lower mold has a planar surface,and the reinforcing structure on the upper mold has a curved surface,the reinforcing structure on the lower mold is resisted by the conformalsupport structure or the support structure, and the reinforcingstructure on the upper mold is resisted by the conformal supportstructure.

When the reinforcing structure on the lower mold has a curved surface,and the reinforcing structure on the upper mold has a planar surface,the reinforcing structure on the lower mold is resisted by the conformalsupport structure, and the reinforcing structure on the upper mold isresisted by the conformal support structure or the support structure.

When the reinforcing structures on both the upper mold and the lowermold have planar surfaces, the reinforcing structures on the lower moldand the upper mold are resisted by the conformal support structure orthe support structure.

When the reinforcing structures on both the upper mold and the lowermold have curved surfaces, the reinforcing structures on the upper moldand the lower mold are resisted by the conformal support structure.

In a further preferred embodiment of the present utility model, each ofthe conformal support structures comprises a base and an underframe forplacing a PLC, and a telescopic cylinder connected to the PLC; theunderframe is mounted above the base; a plurality of telescopiccylinders connected to the PLC are arranged on the underframe. When eachof the reinforcing structures has a curved surface, since the parts arenot on the same horizontal level, different positions need to besupported at different heights. Therefore, the PLC calculates anextending height of each telescopic cylinder according to the shapes ofthe curved surfaces of the reinforcing structures, the upper mold isturned to a limit position through the turnover mechanism, and theconformal support structures can support the upper mold.

The base may be the ground or a support plate. If the underframe issuitable for placing on the ground, no support plate is required. If theground is not suitable for settling the underframe, the base should beadded to cooperate with the underframe.

In a further preferred embodiment of the present utility model, thetelescopic cylinders is powered by a servo motor, a hydraulic system ora pneumatic system. The servo motor, the hydraulic system or thepneumatic system cooperates with the PLC, such that the conformalsupport structures are more flexible in application scenarios; automaticcontrol can reduce the loss of materials, shorten the assembling time,and improve the working efficiency.

In a further preferred embodiment of the present utility model, thenumber of underframes is more than one, and is determined by size of thelower mold or the upper mold.

In a further preferred embodiment of the present utility model, a lengthbetween two adjacent underframes is L, and a deformation of a mold shellin the lower mold or the upper mold is m. The number and placementpositions of the underframes are determined according to weightdistributions of the blade and the mold to ensure effective supporting.The effective support is mainly dependent on the deformation m of theshell within the length L between two support sections along a lengthdirection of the mold, and the relationship is m<L/300.

In a further preferred embodiment of the present utility model, thesupport structure is formed by arranging and combining a plurality ofsteel frames, steel pipes or support rods with different lengths fixedon the ground. When the planar reinforcing structures need to besupported, heights of the steel frames, the steel pipes or the supportrods having different lengths at different positions are manuallycalculated according to a size where the lower mold or the upper moldthat is required to be opened; then the heights of the steel frames, thesteel pipes or the support rods with different lengths are increased ordecreased, and the steel frames, the steel pipes or the support rodswith different lengths are then fixed on the ground.

In a further preferred embodiment of the present utility model, thearranged and combined steel frames, steel pipes or support rods withdifferent lengths increase or decrease the heights of the supportstructures by means of corner joint, snap fit, threaded connection, andthe like.

In a further preferred embodiment of the present utility model, thelow-density material is prepared by combining artificial foam, alow-density inorganic material, a low-density wood and a honeycombmaterial. A spatial thickness of the reinforcing structure obtained bythis preparation method may vary from 60 mm to 2 m, leading to moreflexible application scenarios and a wider application range.

Beneficial effects: Compared with the prior art, the wind turbine blademold structure of the present utility model has the followingadvantages:

-   -   a. the flexural rigidity of the enhanced glass fiber reinforced        plastic mold shell structure is greater than that of a common        mold shell by several orders of magnitude, so that the        anti-deformation capacity of the shell is greatly improved,        providing necessary conditions for fewer and simpler support        structures.    -   b. compared with an original framework structure, the simplified        mold structure made of universal support structures can save        60%-80% of the materials, greatly accelerating the manufacturing        process and reducing the energy consumption and pollution.    -   c. use of the shell and the universal support structures reduces        and simplifies the mounting process, accelerates the mounting        process, and effectively improves the mounting efficiency.    -   d. by means of adjusting the horizontal heights of the conformal        support structures or the support structures, the wind turbine        blade mold structure adapts to mold structures of different        kinds of blades. During replacement of a blade, only the upper        layer structure of the mold is replaced, and the heights of the        conformal support structures or the support structures in the        lower layer are adjusted, so that waste and pollution are        greatly reduced, and the cost is saved, providing a better        solution for sustainable development of economy and environment.    -   e. if part of support components of the support structures or        the conformal support structures need to be replaced due to a        fatigue limit, only the modules or the components are replaced,        so that the flexibility is high. Accessories can be produced in        batches, which improves the working efficiency of turnover of        the mold, shortens the repair time, and increases the        adaptability.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of a blade mold structure in the priorart;

FIG. 2 is a schematic diagram of a turnover action of a mold in theprior art;

FIG. 3 is a schematic structural diagram of a steel frame supportstructure in the prior art;

FIG. 4 is a schematic structural diagram of the conformal supportstructure;

FIG. 5 is a schematic structural diagram of another support structure;

FIG. 6 is a schematic diagram for mounting the support structure;

FIG. 7 is a schematic diagram of the turnover action of the mold in thepresent utility model;

FIG. 8 is a schematic diagram for mounting of the another supportstructure;

FIG. 9 is a schematic diagram for mounting of the another supportstructure;

FIG. 10 is a reinforcing structure of the reinforcing rib structure;

FIG. 11 is a reinforcing structure of the sandwich structure;

FIG. 12 is a reinforcing structure of the box structure;

FIG. 13 is a reinforcing structure of the frame structure;

FIG. 14 is a hydraulic circuit diagram of the telescopic cylinder.

DETAILED DESCRIPTION

The present utility model will be further described below with referenceto the drawings and examples.

A wind turbine blade mold structure is provided, comprising a lower mold301, an upper mold 302, a lower mold shell support structure 201, anupper mold shell support structure 202, a turnover mechanism 401,reinforcing structures (102) separately mounted on outer surfaces of thelower mold 301 and the upper mold 302, and conformal support structures501 or support structures 502 each with one end fixed on the ground andthe other end resisting the reinforcing structures 102, wherein theconformal support structures 501 or the support structures 502 areadjustable in horizontal heights.

The reinforcing structures 102 is of an interior reinforcing ribstructure, frame structure, box structure or sandwich structureconsisting of an artificial foam, a low-density inorganic material, alow-density wood and a honeycomb material.

Each of the conformal support structures 501 comprises a base 5011 andan underframe 5012 for placing a PLC, and a telescopic cylinder 5013connected to the PLC; the underframe 5012 is mounted above the base5011; a plurality of telescopic cylinders 5013 connected to the PLC arearranged on the underframe 5012, as shown in FIG. 4 and FIG. 6 . Whenthe conformal support structure can be directly fixed on the ground, thetelescopic cylinders 5013 connected to the PLC can also be directlyused, as shown in FIG. 9 .

The upper mold shell support structure 202 is driven by the turnovermechanism 401 to separate from the conformal support structures 501 orthe support structures 502 and turn over, and then resists the lowermold 301 to achieve a closing effect, as shown in FIG. 7 .

The support structure 502 is formed by arranging and combining aplurality of steel frames or steel pipes fixed on the ground, as shownin FIG. 8 . When switching to a reinforcing structure 102 with adifferent shape, the conformal support structures 501 and the supportstructures 502 can be recycled for multiple times, thus reducing thecost.

Example 1

When the reinforcing structure 102 on the lower mold 301 has a planarsurface, and the reinforcing structure 102 on the upper mold 302 has acurved surface, the reinforcing structure 102 on the lower mold 301 isresisted by the support structure 502, and the reinforcing structure 102on the upper mold 302 is resisted by the conformal support structure501. The reinforcing structure 102 of a lower mold shell adopts areinforcing rib structure or sandwich structure, as shown in FIG. 10 andFIG. 11 . The reinforcing structure 102 of an upper mold shell adopts abox structure or a frame structure, as shown in FIG. 12 and FIG. 13 . Ata turnover beam, the turnover mechanism 401 is connected and fixed tothe reinforcing structures 102 through the lower mold shell supportstructure 201 or the upper mold shell support structure 202. A pluralityof conformal support structures 501 are arranged between two adjacentturnover mechanisms 401. Effective supporting is achieved by decreasingor increasing the number of the underframes 5012, and extending andretracting heights of the telescopic cylinders are adjusted to fit theshape of the shell, as shown in FIG. 4 and FIG. 6 .

Since the reinforcing structure 102 on the upper mold 302 has a curvedsurface, the parts to be supported are not on the same horizontal level,and thus the parts at different positions need to be supported atdifferent heights. As such, the PLC calculates an extending height ofeach of the telescopic cylinders 5013 according to the shape of thecurved surface of the reinforcing structure 102. The conformal supportstructures 501 support the upper mold 302. The upper mold 302 is turnedto a limit position through the turnover mechanism 401.

A distance sensor is arranged on a side surface of an end of thetelescopic cylinder 5013. After the PLC sends a signal to the hydraulicsystem to enable a piston rod on the telescopic cylinder 5013 to extendto a limit position, when the distance sensor senses that thereinforcing structure 102 is not in contact with the piston rod, thedistance sensor sends the signal to the PLC, and the PLC recalculates anextending height of the telescopic cylinder 5013 according to a receiveddistance of the distance sensor and compensates an extending orretracting distance to ensure the support stability. A hydraulic circuitof each of the conformal support structures 501 is shown in FIG. 14 .

Since the reinforcing structure 102 on the lower mold 301 has a planarsurface, the support structure 502 is formed by arranging and combininga plurality of steel frames fixed on the ground. When the planarreinforcing structure 102 needs to be supported, a height of the steelframes used for supporting the upper mold 302 or the lower mold 301 ismanually calculated according to the height of the lower mold 301 or anopening size of the upper mold 302, and the height of the steel frame orsteel pipe is increased or decreased by means of adjustment of threadedconnection, corner joint, snap fit and the like, as shown in FIG. 8 .

When switching to a different blade, that is, when the reinforcingstructure 102 with a different shape is to be used, the originalreinforcing structures 102 can be removed, and a reinforcing structure102 fitting the shape of the outer surface of the lower mold 301 or theupper mold 302 is mounted; and the conformal support structures 501 andthe support structures 502 are adjusted to fit the new reinforcingstructure 102. The conformal support structures 501 and the supportstructures 502 are highly adaptable and can be reused for multipletimes, thus reducing the cost and improving the working efficiency.

Example 2

When the reinforcing structure 102 on the lower mold 301 and thereinforcing structure 102 on the upper mold 302 have curved surfaces,the reinforcing structure 102 on the lower mold 301 and the reinforcingstructure 102 on the upper mold 302 are resisted by the conformalsupport structures 501. The reinforcing structure 102 of a lower moldshell and the reinforcing structure 102 of an upper mold shell bothadopt a combination of a reinforcing rib structure and sandwichstructure, as shown in FIG. 10 and FIG. 11 . At a turnover beam, theturnover mechanism 401 is connected and fixed to the reinforcingstructures 102 through the lower mold shell support structure 201 or theupper mold shell support structure 202. A plurality of supportstructures 502 are arranged between two adjacent turnover mechanisms401. Effective supporting is achieved by decreasing or increasing thenumber of the underframes 5012, and extending and retracting heights ofthe telescopic cylinders are adjusted to fit the shape of the shell, asshown in FIG. 4 and FIG. 6 .

Since both the reinforcing structure 102 on the lower mold 301 and thereinforcing structure 102 on the upper mold 302 have curved bottomsurfaces, the parts to be supported are not on the same horizontallevel, and thus the parts at different positions need to be supported atdifferent heights. As such, the PLC calculates an extending height ofeach of the telescopic cylinders 5013 according to the shape of thecurved surface of the reinforcing structure 102. The conformal supportstructures 501 support the upper mold 302. The upper mold 302 is turnedto a limit position through the turnover mechanism 401.

A distance sensor is arranged on a side surface of an end of thetelescopic cylinder 5013. After the PLC sends a signal to the hydraulicsystem to enable a piston rod on the telescopic cylinder 5013 to extendto a limit position, when the distance sensor senses that thereinforcing structure 102 is not in contact with the piston rod, thedistance sensor sends the signal to the PLC, and the PLC recalculates anextending height of the telescopic cylinder 5013 according to a receiveddistance of the distance sensor and compensates an extending orretracting distance to ensure the support stability. A hydraulic circuitof each of the conformal support structures 501 is shown in FIG. 14 .

When switching to a different blade, that is, when the reinforcingstructure 102 with a different shape is to be used, the originalreinforcing structures 102 can be removed, and a reinforcing structure102 fitting the shape of the outer surface of the lower mold 301 or theupper mold 302 is mounted; and the conformal support structures 501 andthe support structures 502 are adjusted to fit the new reinforcingstructure 102. The conformal support structures 501 and the supportstructures 502 are highly adaptable and can be reused for multipletimes, thus reducing the cost and improving the working efficiency.

Example 3

When the reinforcing structure 102 on the lower mold 301 has a curvedsurface, and the reinforcing structure 102 on the upper mold 302 has aplanar surface, the reinforcing structure 102 on the lower mold 301 isresisted by the conformal support structure 501, and the reinforcingstructure 102 on the upper mold 302 is resisted by the support structure502. The reinforcing structure 102 of a lower mold shell adopts areinforcing rib structure or sandwich structure, as shown in FIG. 10 andFIG. 11 . The reinforcing structure 102 of an upper mold shell adopts abox structure or a frame structure, as shown in FIG. 12 and FIG. 13 . Ata turnover beam, the turnover mechanism 401 is connected and fixed tothe reinforcing structures 102 through the lower mold shell supportstructure 201 or the upper mold shell support structure 202. A pluralityof support structures 502 are arranged between two adjacent turnovermechanisms 401.

Since the reinforcing structure 102 on the lower mold 301 has a curvedsurface, the parts to be supported are not on the same horizontal level,and thus the parts at different positions need to be supported atdifferent heights. As such, the PLC calculates an extending height ofeach of the telescopic cylinders 5013 according to the shape of thecurved surface of the reinforcing structure 102. The conformal supportstructures 501 support the upper mold 302. The upper mold 302 is turnedto a limit position through the turnover mechanism 401.

A distance sensor is arranged on a side surface of an end of thetelescopic cylinder 5013. After the PLC sends a signal to the hydraulicsystem to enable a piston rod on the telescopic cylinder 5013 to extendto a limit position, when the distance sensor senses that thereinforcing structure 102 is not in contact with the piston rod, thedistance sensor sends the signal to the PLC, and the PLC recalculates anextending height of the telescopic cylinder 5013 according to a receiveddistance of the distance sensor and compensates an extending orretracting distance to ensure the support stability. A hydraulic circuitof each of the conformal support structures 501 is shown in FIG. 13 .

Since the reinforcing structure 102 on the upper mold 301 has a planarsurface, the support structure 502 is formed by arranging and combininga plurality of steel pipes fixed on the ground, as shown in FIG. 5 .When the planar reinforcing structure 102 needs to be supported, aheight of the steel pipes used for supporting the upper mold 302 or thelower mold 301 is manually calculated according to the height of thelower mold 301 or an opening size of the upper mold 302, and the heightof the steel frame or steel pipe is increased or decreased by means ofadjustment of threaded connection, corner joint, snap fit and the like.

When switching to a different blade, that is, when the reinforcingstructure 102 with a different shape is to be used, the originalreinforcing structures 102 can be removed, and a reinforcing structure102 fitting the shape of the outer surface of the lower mold 301 or theupper mold 302 is mounted; and the conformal support structures 501 andthe support structures 502 are adjusted to fit the new reinforcingstructure 102. The conformal support structures 501 and the supportstructures 502 are highly adaptable and can be reused for multipletimes, thus reducing the cost and improving the working efficiency.

Example 4

When the reinforcing structure 102 on the lower mold 301 and thereinforcing structure 102 on the upper mold 302 have planar surfaces,the lower mold 301 and the upper mold 302 are resisted by the supportstructures 502. The reinforcing structure 102 of a lower mold shell andthe reinforcing structure 102 of an upper mold shell both adopt a boxstructure or a frame structure, as shown in FIG. 12 and FIG. 13 . At aturnover beam, the turnover mechanism 401 is connected and fixed to thereinforcing structures 102 through the lower mold shell supportstructure 201 or the upper mold shell support structure 202. A pluralityof support structures 502 are arranged between two adjacent turnovermechanisms 401.

Since both the reinforcing structure 102 on the lower mold 301 and thereinforcing structure 102 on the upper mold 302 have planar surfaces,the support structure 502 on the upper mold 302 is formed by arrangingand combining a plurality of support rods with different lengths fixedon the ground, as shown in FIG. 8 . When the planar reinforcingstructure 102 on the lower mold 301 needs to be supported, a height ofthe steel frames used for supporting the upper mold 302 or the lowermold 301 is manually calculated according to the height of the lowermold 301 or an opening size of the upper mold 302, and the positions ofthe support rods are adjusted according to different heights, as shownin FIG. 8 .

When switching to a different blade, that is, when the reinforcingstructure 102 with a different shape is to be used, the originalreinforcing structures 102 can be removed, and a reinforcing structure102 fitting the shape of the outer surface of the lower mold 301 or theupper mold 302 is mounted; and the conformal support structures 501 andthe support structures 502 are adjusted to fit the new reinforcingstructure 102. The conformal support structures 501 and the supportstructures 502 are highly adaptable and can be reused for multipletimes, thus reducing the cost and improving the working efficiency.

Example 5

When the reinforcing structure 102 on the lower mold 301 and thereinforcing structure 102 on the upper mold 302 have curved surfaces,the lower mold 301 and the upper mold 302 are both resisted by theconformal support structure 501. The reinforcing structure 102 of alower mold shell and the reinforcing structure 102 of an upper moldshell both adopt a box structure or a frame structure, as shown in FIG.12 and FIG. 13 . At a turnover beam, the turnover mechanism 401 isconnected and fixed to the reinforcing structures 102 through the lowermold shell support structure 201 or the upper mold shell supportstructure 202. A plurality of conformal support structures 501 arearranged between two adjacent turnover mechanisms 401. Effectivesupporting is achieved by decreasing or increasing the number of theunderframes 5012 the extending and retracting heights of the telescopiccylinders are adjusted to fit the bottom surface of the reinforcingstructure 102.

The PLC calculates an extending height of each of the telescopiccylinders 5013 according to the bottom surface condition of thereinforcing structure 102. The corresponding conformal supportstructures 501 support the upper mold 302 and the lower mold 301,respectively. The upper mold 302 is turned to a limit position throughthe turnover mechanism 401.

A distance sensor is arranged on a side surface of an end of thetelescopic cylinder 5013. After the PLC sends a signal to the hydraulicsystem to enable a piston rod on the telescopic cylinder 5013 to extendto a limit position, when the distance sensor senses that thereinforcing structure 102 is not in contact with the piston rod, thedistance sensor sends the signal to the PLC, and the PLC recalculates anextending height of the telescopic cylinder 5013 according to a receiveddistance of the distance sensor and compensates an extending orretracting distance to ensure the support stability. A hydraulic circuitof each of the conformal support structures 501 is shown in FIG. 13 .

When switching to a different blade, that is, when the reinforcingstructure 102 with a different shape is to be used, the originalreinforcing structures 102 can be removed, and a reinforcing structure102 fitting the shape of the outer surface of the lower mold 301 or theupper mold 302 is mounted; and the conformal support structures 501 andthe support structures 502 are adjusted to fit the new reinforcingstructure 102. The conformal support structures 501 and the supportstructures 502 are highly adaptable and can be reused for multipletimes, thus reducing the cost and improving the working efficiency.

The above embodiments are intended only to illustrate the technicalconcept and features of the present utility model and to enable thoseskilled in the art to understand the contents of the present utilitymodel and to implement the present utility model, but not to limit theprotection scope of the present utility model. All equivalent changesand modifications made according to the spirit of the present utilitymodel shall fall within the protection scope of the present utilitymodel.

What is claimed is:
 1. A wind turbine blade mold structure, comprising alower mold (301); an upper mold (302); a lower mold shell supportstructure (201) and an upper mold shell support structure (202) locatedon inner surfaces of the lower mold (301) and the upper mold (302),respectively; a turnover mechanism (401) configured for driving theupper mold shell support structure (202) to turn over above the lowermold shell support structure (201); reinforcing structures (102)separately mounted on outer surfaces of the lower mold (301) and theupper mold (302); and conformal support structures (501) or supportstructures (502), each with one end detachably mounted on the ground andthe other end resisting the reinforcing structures (102), wherein theconformal support structures (501) or the support structures (502) areadjustable in horizontal heights; the conformal support structures (501)or the support structures (502) are combined arbitrarily according toshapes of the reinforcing structures (102); each of the reinforcingstructures (102) is a reinforcing rib structure, a box structure, asandwich structure made of a low-density material, a frame structure, ora combined structure of two or more of the above structures.
 2. The windturbine blade mold structure according to claim 1, wherein when each ofthe reinforcing structures (102) has a curved surface, the reinforcingstructure (102) is resisted by the conformal support structure (501). 3.The wind turbine blade mold structure according to claim 1, wherein wheneach of the reinforcing structures (102) has a planar surface, thereinforcing structure (102) is resisted by the conformal supportstructure (501) or the support structure (502).
 4. The wind turbineblade mold structure according to claim 2, wherein each of the conformalsupport structures (501) comprises a base (5011) and an underframe(5012) for placing a programmable logic circuit (PLC), and a telescopiccylinder (5013) connected to the PLC; the underframe (5012) is mountedabove the base (5011); a plurality of telescopic cylinders (5013)connected to the PLC are arranged on the underframe (5012).
 5. The windturbine blade mold structure according to claim 4, wherein thetelescopic cylinders (5013) is powered by a servo motor, a hydraulicsystem or a pneumatic system.
 6. The wind turbine blade mold structureaccording to claim 4, wherein the number of underframes (5012) is morethan one, and is determined by size of the lower mold (301) or the uppermold (302).
 7. The wind turbine blade mold structure according to claim6, wherein a length between two adjacent underframes (5012) is L, and adeformation m of a mold shell in the lower mold (301) or the upper mold(302) is less than L/300.
 8. The wind turbine blade mold structureaccording to claim 3, wherein the support structure (502) is formed byarranging and combining a plurality of steel frames, steel pipes orsupport rods with different lengths fixed on the ground.
 9. The windturbine blade mold structure according to claim 7, wherein the arrangedand combined steel frames, steel pipes or support rods with differentlengths increase or decrease the heights of the support structures (502)by means of corner joint, snap fit, or threaded connection.
 10. The windturbine blade mold structure according to claim 1, wherein thelow-density material is prepared by combining artificial foam, alow-density inorganic material, a low-density wood and a honeycombmaterial.